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Number Revision

Fractions, decimals & percentages — part of Maths on KODO.

AQA Edexcel OCR WJEC SQA

Number is a core area of Maths in the national curriculum. It covers essential concepts that build the foundation for GCSE study and beyond.

This topic includes subtopics such as Fractions, Decimals, Percentages, Ratios and more. Each area is tested with multiple-choice questions that include detailed explanations to deepen your understanding.

Quick Reference

First 10 primes2, 3, 5, 7, 11, 13, 17, 19, 23, 29
HCF of 12 and 186
LCM of 4 and 612
25% of 8020 (80 ÷ 4)

Key Definitions

Prime number
A number greater than 1 that has exactly two factors: 1 and itself (e.g. 2, 3, 5, 7).
HCF
Highest Common Factor — the largest number that divides exactly into two or more numbers.
LCM
Lowest Common Multiple — the smallest number that is a multiple of two or more numbers.
Percentage
A proportion out of 100. To find 10%, divide by 10.
Reciprocal
1 divided by the number. The reciprocal of 5 is 1/5.

What You'll Cover

Fractions
Decimals
Percentages
Ratios
Primes/Factors
BIDMAS
Fractions, decimals and percentages
Ratio and proportion
Order of operations (BIDMAS)
Powers and roots
Negative numbers

Test Yourself — Number

Try 3 quick questions. No account needed.

Quick Quiz

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Memory Tricks & Mnemonics

"Divide, Multiply, Subtract, Bring down" (DMSB) for long division

Remember the steps of the bus-stop method.

"King Henry Doesn't Mind Drinking Chocolate Milk" (Kilo, Hecto, Deca, Main, Deci, Centi, Milli)

Convert between metric units by moving the decimal point.

To find a percentage of a number: divide by 100, multiply by the %

Quick percentage calculations in your head.

Frequently Asked Questions

What is Fractions in Maths Number?+
Fractions is a key subtopic within Number in Maths. It's covered in the KS3 curriculum and tested in assessments. KODO provides multiple-choice questions with detailed explanations to help you master this area.
What is Decimals in Maths Number?+
Decimals is a key subtopic within Number in Maths. It's covered in the KS3 curriculum and tested in assessments. KODO provides multiple-choice questions with detailed explanations to help you master this area.
What is Percentages in Maths Number?+
Percentages is a key subtopic within Number in Maths. It's covered in the KS3 curriculum and tested in assessments. KODO provides multiple-choice questions with detailed explanations to help you master this area.
What is Ratios in Maths Number?+
Ratios is a key subtopic within Number in Maths. It's covered in the KS3 curriculum and tested in assessments. KODO provides multiple-choice questions with detailed explanations to help you master this area.
What is Primes/Factors in Maths Number?+
Primes/Factors is a key subtopic within Number in Maths. It's covered in the KS3 curriculum and tested in assessments. KODO provides multiple-choice questions with detailed explanations to help you master this area.
How many Number questions does KODO have?+
KODO's Number question bank is AI-powered and continuously expanding. Questions are multiple-choice with four options and include detailed explanations for every answer.
Is Number revision on KODO free?+
Yes! KODO offers free daily quiz sessions for all topics including Number. Revision cards are completely free with no limits. Pro users get unlimited quizzes and additional features.

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